# What is the formula mass for Al_2(C_2O_4)_3?

$A {l}_{2} = 54$
${C}_{2} = 24 \mathmr{and} t h e n 24 \cdot 3 = 72$
${O}_{4} = 64 \mathmr{and} t h e n 64 \cdot 3 = 192$